Printer&#39;s quoin



I A. E. UNRUH PRINTERS QUOIN Feb. 97,1526. 1,572,825

Filed May 14 1925 k limping 5m Patented Feb. 9, 1926,

ALBERT E. 'UNRUH, 0F SALEM,

Eric.

OREGON, ASdG-NQB OF GNE-HALF TC STANLEY J.

OSTEANDER, 013 SALEIEE, QBEGQII.

PBINTERS QUOI N.

Application filed May 14;, 1925.

Z '0 all whom it may; concern Be it known that I, ALBERT E. UNRUH, a citizen of the United States, residing at Salein, in the county of Marion and State of Oregon, have invented certain new and useful Improvements in Printers Quoius; and I do declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

My invention aims to provide a rather simple and inexpensive, yet an exceptionally eriicient and desirable quoin which may be easily extended or retracted and will have extended bearing upon the parts with which it is brought into contact.

With the foregoing in view, the invention resides in the novel subject matter hereinafter described and claimed, the description being supplemented by the accompanying drawing.

Figure 1 is a plan view of the quoin in retracted position.

Figure 2 is an edge view.

Figure 3 is a plan view showing the quoin extended.

Figures 1 and 5 are perspective views of the connected wedges of which the quoin is constructed.

Figure 6 is a disassembled perspective view of the wed 'es shown in Fi g. 5.

Figure 7 is a transverse sectional view on line 77 of Fig. 3.

In the drawing above briefly described, the numerals 1 designate one pair of wedges having oblique, contacting, inner edges 2, portions of which are cut away and provided with teeth 3 to be engaged by the usual key. The wide ends 4: of the wedges extend laterally to a slight extent from the contacting surfaces 2 and are formed, in what may be considered their lower sides, with grooves 5 extending in the same direction as the edges 2, the material between these grooves and the extremities of the projecting portions 4, constituting ribs 6. The rib 6 of each wedge 1 is receivable in a longitudinal groove 7 of the other wedge 1, said groove being formed in a longitudinal rib-lile portion 8 which extends along the edge 2. Thus, the two wedges 1 are guided for longitudinal sliding with respect to each other.

The characters 1 designate a pair of addi- Serial No. 30,245.

tional wedges which are similar to the wedges 1, and the inner, contacting, oblique edges 2 of these wedges 1, cross the oblique edges 2 of the wedges 1. lhe wedges 1 are formed with grooves 5 and 7 and with ribs (3 and 8 identical with the corresponding grooves and ribs above described and having the same functions. Also, the wedges 1 are formed with teeth 3 which correspond to the teeth 3.

Additional longitudinal guiding means are preferably employed for the four wedges, consisting of inter-engaging longitudinal ribs and grooves 9 and 10 respectively, the ribs being preferably formed on one pair of the wedges and the grooves in the other pair.

The adjacent, wide ends of the wedges 1 and 1 are connected with each other, so that one of the wedges 1 and one of the wedges 1 move in unison and the same is true of the other wedge 1 and the other wedge 1. These sliding connections are preferably established by forming transverse undercut guideways 11 in the wide ends of one pair of wedges and by providing the wide ends of the other wedges with headed studs 12 slidably received in said guideways.

By providing the novel construction shown and described, or a substantial equivalent thereof, a very desirable quoin is pro-.

duced. The device may be operated by a key from either side, when it is extended in operative position there is practically no tendency for it to work loose, and as two of the wedges project in one direction and the other two in the opposite direction, unusually extensive bearing surfaces are provided between the device and the articles with which it is engaged, there being thus no tendency to spring such articles nor to throw them to undesirable angular positions.

' Excellent results have been obtained from the construction shown and it is therefore preferably followed. However, within the scope of the invention as claimed, modifications may of course be made.

I claim:

1. A printers quoin comprising a pair of co-operating wedges having oblique contact ing inner edges and having their wide ends remote from-each other, a second pair of similar wedges similarly related with each other, one pair of wedges contacting with the other pair, and the oblique edges of one pair crossing the corresponding edges of the other pair, means for longitudinally guiding the Wedges, and slidable connecting means between the adjacent Wide ends of said Wedges causing one Wedge of each pair to move as a single unit with one Wedge of the other pair.

2. A structure as specified in claim 1;

said slida'ble connecting means comprising undercut transverse guideways in two of the Wedges and headed studs on the other Wedges slidably received in said guideways.

In testimony whereof I have hereunto affixed my signature.

ALBERT E. UNRUH. 

